Educational Codeforces Round 21 A. Lucky Year

第二次做codeforces，终于找到在哪里看题解了，可是不知道在哪里看测试数据。。
第一题水题，随便搞搞就过了

#include <cstdio>#include <cstring>typedef long long ll;int main(){    ll year;    scanf("%I64d",&year);    if(year < 10)        printf("1\n");    else    {        ll temp = year;        ll cnt = 0;        ll ten = 1;        ll cur;        while(temp)        {            cur = temp%10;            temp /= 10;            if(cur != 0)                ++cnt;            ten *= 10;        }        ten /= 10;        if(cnt == 1)            printf("%I64d\n",ten);        else            printf("%I64d\n",ten-year%ten);    }    return 0;}